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https://issues.apache.org/jira/browse/HADOOP-13704?focusedWorklogId=739172&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-739172
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ASF GitHub Bot logged work on HADOOP-13704:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Mar/22 22:39
            Start Date: 09/Mar/22 22:39
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus removed a comment on pull request #3978:
URL: https://github.com/apache/hadoop/pull/3978#issuecomment-1041671721


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Patch Compile Tests _ |
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   | +1 :green_heart: |  mvninstall  |   1m 34s |  |  the patch passed  |
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[/blanks-eol.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3978/2/artifact/out/blanks-eol.txt)
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[/results-checkstyle-root.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3978/2/artifact/out/results-checkstyle-root.txt)
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   |  |   | 218m 43s |  |  |
   
   
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   | GITHUB PR | https://github.com/apache/hadoop/pull/3978 |
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   | Max. process+thread count | 1267 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws 
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   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3978/2/console |
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   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 739172)
    Time Spent: 2h 10m  (was: 2h)

> S3A getContentSummary() to move to listFiles(recursive) to count children; 
> instrument use
> -----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-13704
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13704
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Priority: Minor
>              Labels: pull-request-available
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> Hive and a bit of Spark use {{getContentSummary()}} to get some summary stats 
> of a filesystem. This is very expensive on S3A (and any other object store), 
> especially as the base implementation does the recursive tree walk.
> Because of HADOOP-13208, we have a full enumeration of files under a path 
> without directory costs...S3A can/should switch to this to speed up those 
> places where the operation is called.
> Also
> * API call needs FS spec and contract tests
> * S3A could instrument invocation, so as to enable real-world popularity to 
> be measured



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